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5 Written questions

5 Matching questions

  1. Reactants
  2. Combustion
  3. Open System
  4. Enzymes
  5. Endothermic Reaction
  1. a A reaction in which energy is absorbed
  2. b The substances you have at the beginning of a chemical equation
  3. c proteins that act as biological catalysts and lower the activation energy of reactions in cells
  4. d A rapid reaction between oxygen and fuel that results in fire
  5. e Matter can enter or escape to the surroundings

5 Multiple choice questions

  1. The study of matter and how matter changes
  2. Any Change that alters the form or appearance of a substance but that doesn't make the substance into another substance
  3. Aerial shells/charges
  4. The minimum amount of energy needed to start a chemical reaction
  5. Star Pellet

5 True/False questions

  1. ReplacementA reaction in which one element replaces another in a compound, or when two elements in different compounds trade places.


  2. ProductsA material that releases energy when it burns


  3. Chemical ReactionA change in matter that produces one ore more new substances


  4. DecompostionA chemical Reaction that breaks down compounds into simpler products


  5. SynthesisA Chemical Reaction in which two or more simple substances combine to form a new, more complex substance